The correct statement among the following for a "chromatography" purification method is:

C. Rf (Retention factor) of a polar compound is smaller than that of a non-polar compound.

Here's why:

A. Organic compounds do not necessarily run faster than the solvent in the thin layer chromatographic plate. The speed at which a compound moves depends on its interaction with the stationary phase and the solvent.

B. Rf (Retention factor) is not an integral value. It is a ratio of the distance travelled by the compound to the distance travelled by the solvent.

C. The Rf of a polar compound is indeed smaller than that of a non-polar compound. This is because polar compounds interact more strongly with the polar stationary phase, slowing their movement.

D. In column chromatography, it's the non-polar compounds that come down first, not the polar ones. This is because non-polar compounds interact less with the polar stationary phase, allowing them to move faster.

Question

The correct statement among the following for a "chromatography" purification method is:

C. Rf (Retention factor) of a polar compound is smaller than that of a non-polar compound.

Here's why:

A. Organic compounds do not necessarily run faster than the solvent in the thin layer chromatographic plate. The speed at which a compound moves depends on its interaction with the stationary phase and the solvent.

B. Rf (Retention factor) is not an integral value. It is a ratio of the distance travelled by the compound to the distance travelled by the solvent.

C. The Rf of a polar compound is indeed smaller than that of a non-polar compound. This is because polar compounds interact more strongly with the polar stationary phase, slowing their movement.

D. In column chromatography, it's the non-polar compounds that come down first, not the polar ones. This is because non-polar compounds interact less with the polar stationary phase, allowing them to move faster.

Knowee AI · Accepted Answer

The correct statement among the following for a "chromatography" purification method is:

C. Rf (Retention factor) of a polar compound is smaller than that of a non-polar compound.

Here's why:

A. Organic compounds do not necessarily run faster than the solvent in the thin layer chromatographic plate. The speed at which a compound moves depends on its interaction with the stationary phase and the solvent.

B. Rf (Retention factor) is not an integral value. It is a ratio of the distance travelled by the compound to the distance travelled by the solvent.

C. The Rf of a polar compound is indeed smaller than that of a non-polar compound. This is because polar compounds interact more strongly with the polar stationary phase, slowing their movement.

D. In column chromatography, it's the non-polar compounds that come down first, not the polar ones. This is because non-polar compounds interact less with the polar stationary phase, allowing them to move faster.

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